High Pressure Systems
Fixed spray heads—Originally developed for lawn
irrigation, fixed spray heads may be used to irrigate
small containers such as packs and 2-1/2 in. pots;
they generally have a high application rate
(Figure 6–10).
Heads that spray water in various patterns—square,
full circle, partial circle, and rectangular—are
available, as are stationary and pop-up heads.
Sprinkler head spacing is usually 50–75% of the
spray’s diameter. Since most sprinklers have a spray
diameter of less than 30 ft., many nozzles are needed
for large areas.